“There’s nothing more terrifying than putting more guns in our kids schools,” de Blasio said.

Instead, the 36,000 officers of the NYPD will be the only ones armed and patrolling schools alongside school safety agents.

The mayor said parents and students should also be alert.

Earlier this week, a 15-year-old student of the Center for Science and Mathematics in the Bronx was arrested after threatening to shoot fellow students.

He told investigators he was being bullied. Detectives reportedly found a bulletproof vest inside his Fordham Manor home, but the teen was never able to buy a gun. The mayor and parents praised the work of the NYPD.

The threat came days after a gunman killed 17 people at a school in Florida, once again putting a national spotlight on the gun debate.